To　address　the　issues　of　reduced　lifespan　and　compromised　reliability　in　LED　driver　power　supplies　caused　by　electrolytic　capacitors,　an　integrated　flyback　two-switch　electrolytic　capacitor-less　LED　driver　circuit　topology　was　proposed,　which　integrates　a　flyback　converter,　a　Buck-Boost　converter　and　a　Buck　converter,　simplifies　the　circuit　structure,　and　achieves　a　high　power　factor,　low　frequency　of　the　output　current　ripple　suppression　and　constant　current　control.　The　Buck-Boost　converter　was　used　to　transfer　the　excess　energy　from　the　AC　side　to　the　storage　capacitor　of　the　auxiliary　circuit,　and　the　Buck　converter　was　used　to　compensate　for　the　insufficient　energy　on　the　output　side,　which　balances　the　difference　between　the　input　alternating　power　and　the　output　power,　and　reduces　the　capacity　of　the　storage　capacitor,　thus　allowing　the　circuit　to　be　electrolytic　capacitor-less　by　using　small-capacity　film　capacitors　instead　of　electrolytic　capacitors.　The　working　principle　of　the　proposed　circuit　topology　was　analysed　in　detail,　the　control　strategy　applicable　to　this　topology　was　proposed,　and　the　design　method　of　the　main　parameters　of　the　circuit　was　given.　Finally,　a　36　W　experimental　prototype　was　fabricated　to　verify　effectiveness　of　the　proposed　circuit　topology　and　its　control　strategy.　©　2025,　Editorial　Department　of　Electric　Machines　and　Control.　All　rights　reserved.